CardStack – Credit Card Offers

Tracking since Apr 16, 2026.

Changelog

• Apr 16, 2026
  description

  CardStack helps you get more value from your credit cards while you shop online.
  
  It recommends the best card to use for a purchase based on rewards, bonus categories, credits, and available offers, so you can stop guessing and start earning more.
  
  No more missed offers. No more forgotten credits. No more leaving rewards on the table.
  
  FEATURES
  
  Use the best card every time
  CardStack analyzes your cards and shows which one gives you the best return for the purchase in front of you.
  
  Surface relevant offers automatically
  See Amex Offers, Chase Offers, and other savings opportunities while you shop.
  
  Track credits and card benefits
  Monitor statement credits, perks, and annual fee value so you know which cards are actually worth keeping.
  
  Maximize rewards
  Earn more points, miles, and cash back across your credit cards.
  
  Fast and simple
  CardStack is built for clarity and speed, so you can make the right decision in seconds.
  
  Privacy first
  CardStack does not store your full card numbers and does not sell your data.
  
  Install CardStack and get more value from every card in your wallet.

  CardStack helps you get more value from your credit cards while you shop online.
  
  It recommends the best card to use for a purchase based on rewards, bonus categories, credits, and available savings opportunities, so you can stop guessing and start earning more.
  
  No more missed savings. No more forgotten credits. No more leaving rewards on the table.
  
  FEATURES
  
  Use the best card every time
  CardStack analyzes your cards and shows which one gives you the best return for the purchase in front of you.
  
  Surface savings automatically
  See available savings opportunities across your cards while you shop.
  
  Track credits and card benefits
  Monitor statement credits, perks, and annual fee value so you know which cards are actually worth keeping.
  
  Maximize rewards
  Earn more points, miles, and cash back across your credit cards.
  
  Fast and simple
  CardStack is built for clarity and speed, so you can make the right decision in seconds.
  
  Privacy first
  CardStack does not store your full card numbers and does not sell your data.
  
  Install CardStack and get more value from every card in your wallet.
  
  Disclaimer: CardStack is an independent tool and is not affiliated with, endorsed by, or sponsored by American Express, Chase, or any other financial institution. All trademarks are the property of their respective owners.

• Apr 16, 2026
  short_description

  Automatically add Amex and Chase offers and see the best credit card to use on any site while you shop online.

  Auto-add credit card offers and see the best card to use on any site while you shop online.

• Apr 16, 2026
  name

  CardStack – Auto-Add Amex & Chase Offers

  CardStack – Credit Card Offers

• Apr 16, 2026
  host_permissions

  https://cardstack-production.up.railway.app/*, *://www.americanexpress.com/*, *://global.americanexpress.com/*, *://secure.chase.com/*

  https://cardstack-production.up.railway.app/*, https://cardstack-staging-production.up.railway.app/*, *://www.americanexpress.com/*, *://global.americanexpress.com/*, *://secure.chase.com/*, *://ultimaterewardspoints.chase.com/*

Permissions & access

Permissions

storageactiveTabtabsscriptingsidePanel

Host access

https://cardstack-production.up.railway.app/*, https://cardstack-staging-production.up.railway.app/*, *://www.americanexpress.com/*, *://global.americanexpress.com/*, *://secure.chase.com/*, *://ultimaterewardspoints.chase.com/*

Screenshots

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